Benzoic acid, rhodium complex

Benzoic acid, rhodium complex, 27 292 -------, 3-fluoro-, rhodium complex,... 

Oxidative carbonylation of benzene, affording benzoic acid and phenyl benzoate, and catalysed by a system consisting of (PPhslsRhCl and Cu(OAc)2, is proposed to proceed via a mechanism which involves the activation of benzene by a rhodium(in) complex via electrophilic substitution with the formation of an Rh—C c-bond and re-oxidation of rhodium(I) complexes by molecular oxygen with the assistance of the heterobimetallic Rh—Cu intermediate. ... 

Benzoic acids are convenient entry points for this chemistry as they can be converted in a one-pot reaction into an O-methyl hydroxamates [81] This reaction has been developed using rhodium complexes as catalysts and O-methyl hydroxamates as the substrates along with an internal alkyne [81]... 

In an effort to develop new systems able to combine both stability and activity, Siiss-Fink and co-workers reported a family of trans-spanning, but flexible diphosphines.These ligands form stable complexes, due to the chelate effect, which resemble the ones obtained with PEts, (/r . r-[RhI(CO)(PEt3)2]), with the two phosphorus atoms in a /r< //i -disposition. These ligands, as benzoic acid diphenylphosphine derivatives, are supposed to increase the electron density on the rhodium center due to a weak Rh-O interaction. 

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